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Cedar Lake (Masonry Pool) water level today

Lake in King County, Washington

1,518.10ft
462.72 m · gauge reading (local datum, not an elevation)
Measured · provisional
Normal for the dateSteady
24 hours
▼ 0.07 ft
7 days
▲ 0.35 ft
30 days
▼ 1.34 ft
Normal for Oct 23 ?
1,519.63 ft

At a glance · Oct 23

About normal

Cedar Lake (Masonry Pool) is 1.5 ft lower than normal for Oct 23, lower than on this date in 5 of the last 8 years, but still within its normal range.

  • This week↗ Rising 0.35 ft
  • Lowest on record↓ 1,514.10 ft (2018)

Compared with this gauge's own records for the same date. A statistical guide, not advice.

Normal for Oct 23Record lowToday1,518.10 ft

Today compared with past years on Oct 23

Lowest to highest on this date: 1,514.10–1,555.33 ftUsual range (10th–90th percentile): 1,515.59–1,547.38 ftNormal (25th–75th percentile): 1,516.88–1,529.86 ftToday: 1,518.10 ftToday 1,518.10 ftMedian 1,519.63Highest 1,555.3325th75th
Lowest to highest on this date: 1,514.10–1,555.33 ftUsual range (10th–90th percentile): 1,515.59–1,547.38 ftNormal (25th–75th percentile): 1,516.88–1,529.86 ftToday: 1,518.10 ftToday 1,518.10 ftMedian 1,519.63Highest 1,555.3325th75th

Where today's reading sits among this gauge's own records for the same date (±3 days). A statistical guide, not advice.

What this means

It is lower than on Oct 23 in 5 of the last 8 years.

The lake has risen 0.35 ft in 7 days and fallen 1.34 ft in 30 days.

Since 2018, the lowest daily level was 1,514.10 ft (Oct 2018) and the highest 1,567.02 ft (Dec 2025).

Cedar Lake (Masonry Pool) level chart

Loading chart…

Measured Normal range for the date (middle 50% of past years)

2026 compared with 2025

1,5111,5261,5411,5561,571JanFebMarAprMayJunJulAugSepOctNovDec202520262025-09-17: 1,516.43 ft2025-09-22: 1,517.05 ft2025-09-27: 1,516.40 ft2025-10-02: 1,516.42 ft2025-10-07: 1,517.27 ft2025-10-12: 1,516.37 ft2025-10-17: 1,516.55 ft2025-10-22: 1,516.87 ft2025-10-27: 1,519.85 ft2025-11-01: 1,519.16 ft2025-11-06: 1,519.78 ft2025-11-11: 1,520.25 ft2025-11-16: 1,537.46 ft2025-11-21: 1,543.18 ft2025-11-26: 1,540.95 ft2025-12-01: 1,546.13 ft2025-12-06: 1,545.37 ft2025-12-11: 1,567.02 ft2025-12-16: 1,553.15 ft2025-12-21: 1,553.91 ft2025-12-26: 1,553.30 ft2025-12-31: 1,552.94 ft2026-01-05: 1,552.97 ft2026-01-10: 1,553.55 ft2026-01-15: 1,555.36 ft2026-01-20: 1,555.39 ft2026-01-25: 1,554.11 ft2026-01-30: 1,553.87 ft2026-02-04: 1,555.36 ft2026-02-09: 1,555.12 ft2026-02-14: 1,554.86 ft2026-02-19: 1,554.31 ft2026-02-24: 1,554.09 ft2026-03-01: 1,553.62 ft2026-03-06: 1,553.66 ft2026-03-11: 1,556.26 ft2026-03-16: 1,559.34 ft2026-03-21: 1,565.92 ft2026-03-26: 1,560.59 ft2026-03-31: 1,561.00 ft2026-04-05: 1,561.56 ft2026-04-10: 1,562.07 ft2026-04-15: 1,562.71 ft2026-04-20: 1,563.34 ft2026-04-25: 1,564.55 ft2026-04-30: 1,564.64 ft2026-05-05: 1,564.47 ft2026-05-10: 1,564.01 ft2026-05-15: 1,563.60 ft2026-05-20: 1,563.80 ft2026-05-25: 1,563.33 ft2026-05-30: 1,562.55 ft2026-06-04: 1,561.49 ft2026-06-09: 1,560.72 ft2026-06-14: 1,560.77 ft2026-06-19: 1,559.94 ft2026-06-24: 1,559.06 ft2026-06-29: 1,558.04 ft2026-07-04: 1,556.91 ft2026-07-09: 1,555.78 ft2026-07-14: 1,554.66 ft2026-07-19: 1,553.74 ft2026-07-24: 1,552.87 ft2026-07-29: 1,551.97 ft2026-08-03: 1,551.10 ft2026-08-08: 1,549.66 ft2026-08-13: 1,544.04 ft2026-08-18: 1,537.83 ft2026-08-23: 1,532.00 ft2026-08-28: 1,526.49 ft2026-09-02: 1,523.21 ft2026-09-07: 1,521.62 ft2026-09-12: 1,518.36 ft2026-09-17: 1,517.64 ft2026-09-22: 1,519.68 ft2026-09-27: 1,518.37 ft2026-10-02: 1,517.73 ft2026-10-07: 1,517.66 ft2026-10-12: 1,517.70 ft2026-10-17: 1,518.00 ft
1,5111,5261,5411,5561,571JanAprJulOct202520262025-09-17: 1,516.43 ft2025-09-22: 1,517.05 ft2025-09-27: 1,516.40 ft2025-10-02: 1,516.42 ft2025-10-07: 1,517.27 ft2025-10-12: 1,516.37 ft2025-10-17: 1,516.55 ft2025-10-22: 1,516.87 ft2025-10-27: 1,519.85 ft2025-11-01: 1,519.16 ft2025-11-06: 1,519.78 ft2025-11-11: 1,520.25 ft2025-11-16: 1,537.46 ft2025-11-21: 1,543.18 ft2025-11-26: 1,540.95 ft2025-12-01: 1,546.13 ft2025-12-06: 1,545.37 ft2025-12-11: 1,567.02 ft2025-12-16: 1,553.15 ft2025-12-21: 1,553.91 ft2025-12-26: 1,553.30 ft2025-12-31: 1,552.94 ft2026-01-05: 1,552.97 ft2026-01-10: 1,553.55 ft2026-01-15: 1,555.36 ft2026-01-20: 1,555.39 ft2026-01-25: 1,554.11 ft2026-01-30: 1,553.87 ft2026-02-04: 1,555.36 ft2026-02-09: 1,555.12 ft2026-02-14: 1,554.86 ft2026-02-19: 1,554.31 ft2026-02-24: 1,554.09 ft2026-03-01: 1,553.62 ft2026-03-06: 1,553.66 ft2026-03-11: 1,556.26 ft2026-03-16: 1,559.34 ft2026-03-21: 1,565.92 ft2026-03-26: 1,560.59 ft2026-03-31: 1,561.00 ft2026-04-05: 1,561.56 ft2026-04-10: 1,562.07 ft2026-04-15: 1,562.71 ft2026-04-20: 1,563.34 ft2026-04-25: 1,564.55 ft2026-04-30: 1,564.64 ft2026-05-05: 1,564.47 ft2026-05-10: 1,564.01 ft2026-05-15: 1,563.60 ft2026-05-20: 1,563.80 ft2026-05-25: 1,563.33 ft2026-05-30: 1,562.55 ft2026-06-04: 1,561.49 ft2026-06-09: 1,560.72 ft2026-06-14: 1,560.77 ft2026-06-19: 1,559.94 ft2026-06-24: 1,559.06 ft2026-06-29: 1,558.04 ft2026-07-04: 1,556.91 ft2026-07-09: 1,555.78 ft2026-07-14: 1,554.66 ft2026-07-19: 1,553.74 ft2026-07-24: 1,552.87 ft2026-07-29: 1,551.97 ft2026-08-03: 1,551.10 ft2026-08-08: 1,549.66 ft2026-08-13: 1,544.04 ft2026-08-18: 1,537.83 ft2026-08-23: 1,532.00 ft2026-08-28: 1,526.49 ft2026-09-02: 1,523.21 ft2026-09-07: 1,521.62 ft2026-09-12: 1,518.36 ft2026-09-17: 1,517.64 ft2026-09-22: 1,519.68 ft2026-09-27: 1,518.37 ft2026-10-02: 1,517.73 ft2026-10-07: 1,517.66 ft2026-10-12: 1,517.70 ft2026-10-17: 1,518.00 ft
20262025Normal (middle 50% of past years)Usual range (10th–90th percentile)Median

Each year drawn on the same January–December axis, over this gauge's normal range for each date. Hover or tap a point for its value.

Same date in past years

DateLevelvs today
Oct 23, 20251,516.75 ft▼ 1.35 ft
Oct 23, 20241,520.15 ft▲ 2.05 ft
Oct 23, 20231,515.93 ft▼ 2.17 ft
Oct 23, 20221,519.23 ft▲ 1.13 ft
Oct 23, 20211,524.99 ft▲ 6.89 ft
Oct 23, 20201,552.44 ft▲ 34.34 ft
Oct 23, 20191,555.33 ft▲ 37.23 ft
Oct 23, 20181,514.21 ft▼ 3.89 ft

Records & details

Highest
1,567.02 ft on Dec 11, 2025
Lowest
1,514.10 ft on Oct 22, 2018
Records from
2018 (8 years of daily data)
Water temperature
Not measured here

Full history: yearly highs and lows, monthly averages →

Masonry Dam

Height
230 ft
Completed
1914
Purposes
Hydroelectric; Water Supply
Owner
Seattle City Light
Normal storage
90,660 acre-ft
Surface area
280 acres

National Inventory of Dams (U.S. Army Corps of Engineers). All dam facts →

Campgrounds near Cedar Lake (Masonry Pool)

  • Tinkham Campground8.7 mi · FS

Federal campgrounds from Recreation.gov; straight-line distance from the lake's gauge or dam.

Weather & wind

Overnight34°F · Partly Cloudy
Wind NNW 2 mph
Friday41°F · Partly Sunny
Wind NW 2 to 6 mph
Friday Night31°F · Mostly Clear
Wind ESE 2 to 8 mph
Saturday48°F · Partly Sunny
Wind NW 1 to 9 mph
Saturday Night37°F · Chance Light Rain
Wind E 2 to 14 mph
Sunday48°F · Chance Light Rain
Wind E 3 to 14 mph

NOAA National Weather Service forecast for this lake's location, updated 11 h ago.

Nearby lakes

All Washington lake levels →